Brookfield CAP2000 Viscometer - Manual (Page 13)

Brookfield Engineering Labs., Inc. Page 13 Manual No. M/94-310F
III.1 Accuracy of Measurement
Table 3.1 indicates the accuracy of the viscosity measurement which depends on both the rota-
tional speed of the cone and the percent of full scale range (in Poise) at which viscosity is
measured. The accuracy for viscosity data provided by CAP Viscometers is the indicated per-
centage of the full scale range. See Appendix A for information on how to determine Full Scale
Viscosity Range (FSR).
ACCURACY OF VISCOSITY MEASUREMENT
Table 3.1
CAP 1000L AND CAP 2000L VISCOMETERS
FULLSCALE VISCOSITY RANGE ACCURACY
Cone 750 RPM 900RPM Over 900 RPM to 2000 RPM
01
≤ ±
2.0%
≤ ±
2.0%
02
≤ ±
2.0%
≤ ±
2.0%
03
≤ ±
2.0%
≤ ±
2.0%
04
≤ ±
2.0%
≤ ±
4.0%
05
≤ ±
2.0%
≤ ±
4.0%
06
≤ ±
4.0%
≤ ±
10.0%
Varies depending on the
thermal conductivity of the
sample being measured
FULLSCALE VISCOSITY RANGE ACCURACY
Cone 750 RPM 900RPM Over 900 RPM to 2000 RPM
10 to 100% FSR
≤
50% FSR >50% FSR FSR = Full Scale Range
01
≤ ±
2.0%
≤ ±
2.0%
≤ ±
4.0%
02
≤ ±
2.0%
≤ ±
2.0%
≤ ±
4.0%
03
≤ ±
2.0%
≤ ±
2.0%
≤ ±
4.0%
04
≤ ±
3.0%
≤ ±
3.0%
≤ ±
6.0%
05
≤ ±
4.0%
≤ ±
4.0%
≤ ±
8.0%
06
≤ ±
5.0%
≤ ±
5.0%
≤ ±
10.0%
Varies depending on the
thermal conductivity of the
sample being measured
Viscometer Temperature Control Accuracy
CAP1000L & H
±
0.2
°
C
CAP2000L & H
±
0.2
°
C
Note: For CAP2000L Viscometers, the accuracy stated at 750 RPM and 900 RPM applies
over the speed range 50 RPM to 750 RPM and 50 RPM to 900 RPM.